Circuit Breaker Size Calculator

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Inputs
Result
32A

Calculated load current is 24.1 A. Minimum breaker rating after sizing factor is 30.1 A.

Load current24.1 A
Sizing factor125%
Minimum rating30.1 A
Rounded standard rating32 A
Next checks
  • Verify trip curve, breaking capacity, cable ampacity, and selectivity.
  • For motors or transformers, check inrush and coordination before selecting the final device.
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